Home / Standards / GB/T 13220-1991 GB/T 13220-1991 Active Determination of particle size distribution of fine powder--Method of sieve classfication with sonic wave 细粉末粒度分布的测定 声波筛分法 Standard Type GBT ICS 77.040.20 CCS H21 Status 现行 Issue Date 1991-10-05 Implementation 1992-06-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A